group WJSN Summer, LUDA, and Yoo Yeon-jung attended a radio broadcast on SBS in Mokdong, Seoul on the 19th.
About WJSN
WJSN, also known as Cosmic Girls, is a South Korean-Chinese girl group formed by Starship Entertainment and Yuehua Entertainment. The group debuted on February 25, 2016, with the extended play Would You Like? and with twelve members: Seola, Xuanyi, Bona, Exy, Soobin, Luda, Dawon, Eunseo, Cheng Xiao, Meiqi, Yeoreum and Dayoung. In July 2016, WJSN added a thirteenth member, Yeonjung, to the group.
 Wikipedia